This is the most effective way to practice. You can find tasks and solutions for the 9th grade on the Moscow Olympiad for Schoolchildren portal.

For 9th grade, focus on these core areas of biology and ecology:

Food chains, energy flow, and biogeochemical cycles (carbon, nitrogen).

Multiple-choice questions, matching tasks, and open-ended questions where you must explain ecological processes.

Global warming, pollution, waste management, and international environmental agreements. 3. Study Resources

Preparing for the (olimpiada po jekologii) requires a mix of theoretical knowledge and practical project skills. Since these competitions usually follow the structure of the All-Russian Olympiad for Schoolchildren (VOSH) , 1. Structure of the Olympiad The competition typically consists of two main parts: